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San Luis Obispo staff warn new Cal Fire hazard maps will put large share of city into high-risk zones
Summary
City staff told a developer roundtable that Cal Fire's updated wildfire maps place about 60% of parcels in moderate-to-very-high hazard zones and that the city must adopt the maps by July 1, triggering new defensible-space reviews and certain building-code changes.
Tim Lowe, community development staff, told the San Luis Obispo Development Roundtable that Cal Fire's new wildfire hazard maps will substantially expand areas subject to higher construction and defensible-space requirements and must be adopted by the city by July 1.
"The new map is 60% of the parcels in the city are in some zones of moderate, high, or very high," Lowe said during the meeting. He added that by area 28% of the city is now mapped as very high, 10% high and 25% moderate.
The maps were released earlier this year, Lowe said, and staff will present a formal staff report to council ahead of a scheduled first reading on June 3. The changes mean that many more parcels will be subject to Chapter 7A building standards and to defensible-space requirements enforced by the fire department when there is a qualifying trigger (for example, new construction or material changes).
Lowe and other staff described likely practical impacts: certain ignition-resistant construction materials (tempered windows, noncombustible decking or gutters with covers) may be required in the newly designated high and very-high zones. The meeting also flagged that defensible-space enforcement raises difficult questions for urban parcels with zero setbacks and for properties adjacent to unimproved open space.
"When there is a trigger, when 7A is required for new construction, defensible space gets enforced as well," Lowe said, adding that the city is still developing an enforcement program and that much of the initial outreach will be educational. Staff said they are evaluating whether additional plan-review fees are justified to cover the extra review time and whether defensible-space review will be processed as a deferred submittal or integrated into standard building reviews.
Attendees raised implementation concerns for downtown and infill parcels. One participant noted the potential conflict with existing tree regulations and with architectural-review guidance for building details. Lowe said staff is tracking those conflicts as part of the work program and will propose code cleanups where local rules conflict with state fire-safety requirements.
Staff recommended property owners and design professionals review the June 3 staff report when published, and announced that the maps are available at parcel level on the Cal Fire mapping portal. Lowe said city staff will consult with partner agencies and jurisdictions that have handled similar transitions to borrow best practices.
The meeting did not include a formal council vote. Lowe said the city must adopt the maps by July 1 to meet state timelines and that more detailed implementation guidance will follow in staff reports and public study sessions.
